In the final years of the 13th Century, England was gripped in a crisis caused by a series of ongoing wars all around them; economically, socially, as well as militarily, the country was being pushed to its limits. And in this episode, which details a lot of what was going on around it, the City of London, and a former mayor of London, saw an opportunity to exploit this situation for their advantage… and to try and blag from the brutal Edward I the return of something long thought lost…